Actual bleach. I typically use oxi-clean, very rarely use bleach. I've found that even the most severe staining/yellowing can be removed by soaking the clothes

Actual bleach. I typically use oxi-clean, very rarely use bleach. I've found that even the most severe staining/yellowing can be removed by soaking the clothes in the washer overnight with oxi-clean (something that's not really possible with front loader machines).